Skills of soldering circuit board 1:
The process flow of selective welding includes: flux spraying, circuit board preheating, immersion welding and drag welding. Flux coating process in selective welding, flux coating process plays an important role. At the end of welding heating and welding, the flux shall have sufficient activity to prevent bridging and oxidation of the circuit board. Flux spraying is carried by X / y manipulator. The circuit board passes above the flux nozzle, and the flux is sprayed on the welding position of PCB circuit board.